Metal Porous Particles Sintered Filter Tube With Max Temperature
These sintered porous metal filter elements are produced by cold
isostatic pressing. For the compaction process the metal powder is
filled into the compacting tool of combined steel and elastic
material. By use of all around effective pressure build-up in a
liquid, uniform porosity in the press part will be obtained and
thereby homogeneous, physical characteristic properties will be
guaranteed over the total part.
By this processing method the manufacture of seamless filter
elements up to 1200 mm length and 320 mm diameter by differential
wall thicknesses is possible. The isostatic pressing allows
simultaneous compaction of flanges and threads. Thereby the
mounting of such porous filter cartridges and filter tubes in the
filter apparatus is very much simplified. A characteristic of the
isostatic technique, as opposed to other manufacturing technologies
is that smaller quantities can also be economically produced.
Materials of sintered porous metal filter elements
|Materials||SINTERED BRONZE||SINTERED STAINLESS STEEL|
|Tensile strength||21-28 MPa||10-180 MPa|
|Density (g/cc)||4.5-5.6 (51-64%)||5.2-5.8 (67-72%)|
|Max operating temp||480C||800C|
|Chemical composition||89-96% Cu, bal. Sn||316L (18Cr, 8Ni, 2Mo)|
Corrosion Resistant Alloys sintered porous metal filter is
available in a wide variety of corrosion resistant alloys
including: Stainless Steel 316 L , 304L, 310, 347, and 430;
Hastelloy B, B-2, C-22, C276, N and X; Inconel 600, 625, and 690;
Monel 400; Nickel 200; Alloy 20; Titanium. High Temperature
Capability Sintered porous metal offers a temperature range of 750
to 1750°F depending on alloy material and atmospheric conditions as
indicated in Table 1. Temperature limitations of sintered porous
metal in an oxidizing environment are not due to strength of
material, but due to oxides which form at elevated temperatures.
The specific void volume of the oxide is much greater than the
parent metal, which results in plugging of the pores in the media.
In a reducing or neutral Figure 1. Micrograph of 316L stainless
steel 2 mm media (100 x magnification). Table 1 Max. Temperatures
using Sintered Metal Material Oxidizing Reducing 316 L SS 750° F
1000° F 310 SS 1100° F 1500° F Inconel 600 1100° F 1500° F
Hastelloy X 1450° F 1750° F atmosphere, temperature limitations are
due to strength of the material at elevated temperatures.